或者你自己都没发觉自己曾离开过。

Before you even know you're gone.

youdao

这几天忙的厉害，借的《水浒传》居然过期了，都没发觉。难得今天去图书馆，借书时，才知道。

Terrible busy these days, by the "Water Margin" actually expired, no found. Rare today, go to the library, library hours, before we know.

youdao

但是在月末你会发觉你根本都没做那么好。

But at the end of the month you may find you haven't gotten that much done.

youdao